const obj = {
    abs: true,
    acos: true,
    acosh: true,
    asin: true,
    asinh: true,
    atan: true,
    atan2: true,
    atanh: true,
    cbrt: true,
    ceil: true,
    clz32: true,
    cos: true,
    cosh: true,
    expm1: true,
    exp: true,
    floor: true,
    fround: true,
    imul: true,
    log: true,
    log2: true,
    log10: true,
    log1p: true,
    max: true,
    min: true,
    pow: true,
    random: true,
    round: true,
    sign: true,
    sin: true,
    sinh: true,
    sqrt: true,
    tan: true,
    tanh: true,
    trunc: true,
};

const arr = Object.keys(obj);
const map = new Map();

arr.forEach(val => map.set(val, true));

function findArrIncludes(find) {
    return arr.includes(find);
}

function findArrIndexOf(find) {
    return arr.indexOf(find) > -1;
}

function findObj(find) {
    return !!obj[find];
}

function findMap(find) {
    return map.has(find);
}

const END_ELEM = arr[arr.length - 1];
const FIRST_ELEM = arr[0];
const MIDDLE_ELEM = arr[Math.floor(arr.length / 2)]

function bench(fn, suffix, elem) {
    const t = new Date().getTime();

    for (let i = 0; i < 1e9; i++) {
        fn(elem);
    }

    console.log(fn.name + suffix, new Date().getTime() - t, 'ms');
}

function benchaddo(fn) {
    bench(fn, '_first', FIRST_ELEM);
    bench(fn, '_middle', MIDDLE_ELEM);
    bench(fn, '_end', END_ELEM);
}

// benchaddo(findArrIndexOf);
// benchaddo(findArrIncludes);
benchaddo(findObj);
// benchaddo(findMap);